tinymce-editor/Application/fileman/php/renamefile.php

<?php
/*
  RoxyFileman - web based file manager. Ready to use with CKEditor, TinyMCE.
  Can be easily integrated with any other WYSIWYG editor or CMS.

  Copyright (C) 2013, RoxyFileman.com - Lyubomir Arsov. All rights reserved.
  For licensing, see LICENSE.txt or http://RoxyFileman.com/license

  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.

  Contact: Lyubomir Arsov, liubo (at) web-lobby.com
*/
include '../system.inc.php';
include 'functions.inc.php';

verifyAction('RENAMEFILE');
checkAccess('RENAMEFILE');

$path = RoxyFile::FixPath(trim(empty($_POST['f']) ? '' : $_POST['f']));
$name = RoxyFile::FixPath(trim(empty($_POST['n']) ? '' : $_POST['n']));
verifyPath($path);

if (is_file(fixPath($path))) {
    if (!RoxyFile::CanUploadFile($name)) {
        echo getErrorRes(t('E_FileExtensionForbidden') . ' ".' . RoxyFile::GetExtension($name) . '"');
    } elseif (rename(fixPath($path), dirname(fixPath($path)) . '/' . $name)) {
        echo getSuccessRes();
    } else {
        echo getErrorRes(t('E_RenameFile') . ' ' . basename($path));
    }
} else {
    echo getErrorRes(t('E_RenameFileInvalidPath'));
}